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https://github.com/oliverschmidt/contiki.git
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616 lines
14 KiB
C
616 lines
14 KiB
C
#include <strformat.h>
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#define HAVE_DOUBLE
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#define HAVE_LONGLONG
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#ifndef LARGEST_SIGNED
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#ifdef HAVE_LONGLONG
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#define LARGEST_SIGNED long long int
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#else
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#define LARGEST_UNSIGNED long int
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#endif
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#endif
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#ifndef LARGEST_UNSIGNED
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#ifdef HAVE_LONGLONG
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#define LARGEST_UNSIGNED unsigned long long int
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#else
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#define LARGEST_UNSIGNED unsigned long int
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#endif
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#endif
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#ifndef POINTER_INT
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#define POINTER_INT unsigned long
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#endif
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typedef unsigned int FormatFlags;
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#define MAKE_MASK(shift,size) (((1 << size) - 1) << (shift))
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#define JUSTIFY_SHIFT 0
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#define JUSTIFY_SIZE 1
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#define JUSTIFY_RIGHT 0x0000
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#define JUSTIFY_LEFT 0x0001
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#define JUSTIFY_MASK MAKE_MASK(JUSTIFY_SHIFT,JUSTIFY_SIZE)
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/* How a positive number is prefixed */
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#define POSITIVE_SHIFT (JUSTIFY_SHIFT + JUSTIFY_SIZE)
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#define POSITIVE_NONE (0x0000 << POSITIVE_SHIFT)
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#define POSITIVE_SPACE (0x0001 << POSITIVE_SHIFT)
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#define POSITIVE_PLUS (0x0003 << POSITIVE_SHIFT)
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#define POSITIVE_MASK MAKE_MASK(POSITIVE_SHIFT, POSITIVE_SIZE)
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#define POSITIVE_SIZE 2
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#define ALTERNATE_FORM_SHIFT (POSITIVE_SHIFT + POSITIVE_SIZE)
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#define ALTERNATE_FORM_SIZE 1
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#define ALTERNATE_FORM (0x0001 << ALTERNATE_FORM_SHIFT)
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#define PAD_SHIFT (ALTERNATE_FORM_SHIFT + ALTERNATE_FORM_SIZE)
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#define PAD_SIZE 1
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#define PAD_SPACE (0x0000 << PAD_SHIFT)
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#define PAD_ZERO (0x0001 << PAD_SHIFT)
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#define SIZE_SHIFT (PAD_SHIFT + PAD_SIZE)
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#define SIZE_SIZE 3
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#define SIZE_CHAR (0x0001 << SIZE_SHIFT)
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#define SIZE_SHORT (0x0002 << SIZE_SHIFT)
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#define SIZE_INT (0x0000 << SIZE_SHIFT)
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#define SIZE_LONG (0x0003 << SIZE_SHIFT)
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#define SIZE_LONGLONG (0x0004 << SIZE_SHIFT)
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#define SIZE_MASK MAKE_MASK(SIZE_SHIFT,SIZE_SIZE)
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#define CONV_SHIFT (SIZE_SHIFT + SIZE_SIZE)
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#define CONV_SIZE 3
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#define CONV_INTEGER (0x0001 << CONV_SHIFT)
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#define CONV_FLOAT (0x0002 << CONV_SHIFT)
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#define CONV_POINTER (0x0003 << CONV_SHIFT)
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#define CONV_STRING (0x0004 << CONV_SHIFT)
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#define CONV_CHAR (0x0005 << CONV_SHIFT)
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#define CONV_PERCENT (0x0006 << CONV_SHIFT)
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#define CONV_WRITTEN (0x0007 << CONV_SHIFT)
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#define CONV_MASK MAKE_MASK(CONV_SHIFT, CONV_SIZE)
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#define RADIX_SHIFT (CONV_SHIFT + CONV_SIZE)
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#define RADIX_SIZE 2
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#define RADIX_DECIMAL (0x0001 << RADIX_SHIFT)
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#define RADIX_OCTAL (0x0002 << RADIX_SHIFT)
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#define RADIX_HEX (0x0003 << RADIX_SHIFT)
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#define RADIX_MASK MAKE_MASK(RADIX_SHIFT,RADIX_SIZE)
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#define SIGNED_SHIFT (RADIX_SHIFT + RADIX_SIZE)
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#define SIGNED_SIZE 1
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#define SIGNED_NO (0x0000 << SIGNED_SHIFT)
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#define SIGNED_YES (0x0001 << SIGNED_SHIFT)
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#define SIGNED_MASK MAKE_MASK(SIGNED_SHIFT,SIGNED_SIZE)
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#define CAPS_SHIFT (SIGNED_SHIFT + SIGNED_SIZE)
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#define CAPS_SIZE 1
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#define CAPS_NO (0x0000 << CAPS_SHIFT)
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#define CAPS_YES (0x0001 << CAPS_SHIFT)
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#define CAPS_MASK MAKE_MASK(CAPS_SHIFT,CAPS_SIZE)
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#define FLOAT_SHIFT (CAPS_SHIFT + CAPS_SIZE)
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#define FLOAT_SIZE 2
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#define FLOAT_NORMAL (0x0000 << FLOAT_SHIFT)
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#define FLOAT_EXPONENT (0x0001 << FLOAT_SHIFT)
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#define FLOAT_DEPENDANT (0x0002 << FLOAT_SHIFT)
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#define FLOAT_HEX (0x0003 << FLOAT_SHIFT)
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#define FLOAT_MASK MAKE_MASK(FLOAT_SHIFT, FLOAT_SIZE)
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static FormatFlags
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parse_flags(const char **posp)
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{
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FormatFlags flags = 0;
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const char *pos = *posp;
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while (1) {
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switch(*pos) {
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case '-':
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flags |= JUSTIFY_LEFT;
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break;
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case '+':
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flags |= POSITIVE_PLUS;
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break;
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case ' ':
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flags |= POSITIVE_SPACE;
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break;
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case '#':
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flags |= ALTERNATE_FORM;
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break;
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case '0':
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flags |= PAD_ZERO;
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break;
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default:
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*posp = pos;
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return flags;
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}
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pos++;
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}
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}
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static unsigned int
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parse_uint(const char **posp)
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{
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unsigned v = 0;
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const char *pos = *posp;
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char ch;
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while((ch = *pos) >= '0' && ch <= '9') {
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v = v * 10 + (ch - '0');
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pos++;
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}
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*posp = pos;
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return v;
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}
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#define MAXCHARS_HEX ((sizeof(LARGEST_UNSIGNED) * 8) / 4 )
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/* Largest number of characters needed for converting an unsigned integer.
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*/
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#define MAXCHARS ((sizeof(LARGEST_UNSIGNED) * 8 + 2) / 3 )
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static unsigned int
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output_uint_decimal(char **posp, LARGEST_UNSIGNED v)
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{
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unsigned int len;
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char *pos = *posp;
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while (v > 0) {
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*--pos = (v % 10) + '0';
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v /= 10;
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}
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len = *posp - pos;
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*posp = pos;
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return len;
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}
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static unsigned int
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output_uint_hex(char **posp, LARGEST_UNSIGNED v, unsigned int flags)
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{
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unsigned int len;
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const char *hex = (flags & CAPS_YES) ?"0123456789ABCDEF":"0123456789abcdef";
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char *pos = *posp;
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while (v > 0) {
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*--pos = hex[(v % 16)];
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v /= 16;
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}
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len = *posp - pos;
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*posp = pos;
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return len;
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}
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static unsigned int
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output_uint_octal(char **posp, LARGEST_UNSIGNED v)
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{
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unsigned int len;
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char *pos = *posp;
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while (v > 0) {
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*--pos = (v % 8) + '0';
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v /= 8;
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}
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len = *posp - pos;
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*posp = pos;
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return len;
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}
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static StrFormatResult
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fill_space(const StrFormatContext *ctxt, unsigned int len)
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{
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StrFormatResult res;
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static const char buffer[16] = " ";
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while(len > 16) {
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res = ctxt->write_str(ctxt->user_data, buffer, 16);
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if (res != STRFORMAT_OK) return res;
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len -= 16;
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}
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if (len == 0) return STRFORMAT_OK;
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return ctxt->write_str(ctxt->user_data, buffer, len);
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}
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static StrFormatResult
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fill_zero(const StrFormatContext *ctxt, unsigned int len)
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{
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StrFormatResult res;
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static const char buffer[16] = "0000000000000000";
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while(len > 16) {
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res = ctxt->write_str(ctxt->user_data, buffer, 16);
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if (res != STRFORMAT_OK) return res;
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len -= 16;
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}
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if (len == 0) return STRFORMAT_OK;
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return ctxt->write_str(ctxt->user_data, buffer, len);
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}
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#define CHECKCB(res) {if ((res) != STRFORMAT_OK) {va_end(ap); return -1;}}
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int
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format_str(const StrFormatContext *ctxt, const char *format, ...)
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{
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int ret;
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va_list ap;
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va_start(ap, format);
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ret = format_str_v(ctxt, format, ap);
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va_end(ap);
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return ret;
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}
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int
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format_str_v(const StrFormatContext *ctxt, const char *format, va_list ap)
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{
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unsigned int written = 0;
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const char *pos = format;
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while(*pos != '\0') {
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FormatFlags flags;
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unsigned int minwidth = 0;
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int precision = -1; /* Negative means no precision */
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char ch;
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const char *start = pos;
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while( (ch = *pos) != '\0' && ch != '%') pos++;
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if (pos != start) {
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CHECKCB(ctxt->write_str(ctxt->user_data, start, pos - start));
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written += pos - start;
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}
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if (*pos == '\0') {
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va_end(ap);
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return written;
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}
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pos++;
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if (*pos == '\0') {
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va_end(ap);
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return written;
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}
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flags = parse_flags(&pos);
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/* parse width */
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if (*pos >= '1' && *pos <= '9') {
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minwidth = parse_uint(&pos);
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} else if (*pos == '*') {
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int w = va_arg(ap,int);
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if (w < 0) {
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flags |= JUSTIFY_LEFT;
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minwidth = w;
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} else {
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minwidth = w;
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}
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pos ++;
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}
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/* parse precision */
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if (*pos == '.') {
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pos++;
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if (*pos >= '0' && *pos <= '9') {
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precision = parse_uint(&pos);
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} else if (*pos == '*') {
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precision = va_arg(ap,int);
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}
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}
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if (*pos == 'l') {
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pos++;
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if (*pos == 'l') {
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flags |= SIZE_LONGLONG;
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pos++;
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} else {
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flags |= SIZE_LONG;
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}
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} else if (*pos == 'h') {
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pos++;
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if (*pos == 'h') {
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flags |= SIZE_CHAR;
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pos++;
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} else {
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flags |= SIZE_SHORT;
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}
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}
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/* parse conversion specifier */
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switch(*pos) {
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case 'd':
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case 'i':
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flags |= CONV_INTEGER | RADIX_DECIMAL | SIGNED_YES;
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break;
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case 'u':
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flags |= CONV_INTEGER | RADIX_DECIMAL | SIGNED_NO;
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break;
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case 'o':
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flags |= CONV_INTEGER | RADIX_OCTAL | SIGNED_NO;
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break;
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case 'x':
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flags |= CONV_INTEGER | RADIX_HEX | SIGNED_NO;
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break;
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case 'X':
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flags |= CONV_INTEGER | RADIX_HEX | SIGNED_NO | CAPS_YES;
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break;
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#ifdef HAVE_DOUBLE
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case 'f':
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flags |= CONV_FLOAT | FLOAT_NORMAL;
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break;
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case 'F':
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flags |= CONV_FLOAT | FLOAT_NORMAL | CAPS_YES;
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break;
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case 'e':
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flags |= CONV_FLOAT | FLOAT_EXPONENT;
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break;
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case 'E':
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flags |= CONV_FLOAT | FLOAT_EXPONENT | CAPS_YES;
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break;
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case 'g':
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flags |= CONV_FLOAT | FLOAT_DEPENDANT;
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break;
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case 'G':
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flags |= CONV_FLOAT | FLOAT_DEPENDANT | CAPS_YES;
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break;
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case 'a':
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flags |= CONV_FLOAT | FLOAT_HEX;
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break;
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case 'A':
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flags |= CONV_FLOAT | FLOAT_HEX | CAPS_YES;
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break;
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#endif
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case 'c':
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flags |= CONV_CHAR;
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break;
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case 's':
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flags |= CONV_STRING;
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break;
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case 'p':
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flags |= CONV_POINTER;
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break;
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case 'n':
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flags |= CONV_WRITTEN;
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break;
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case '%':
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flags |= CONV_PERCENT;
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break;
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case '\0':
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va_end(ap);
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return written;
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}
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pos++;
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switch(flags & CONV_MASK) {
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case CONV_PERCENT:
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CHECKCB(ctxt->write_str(ctxt->user_data, "%", 1));
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written++;
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break;
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case CONV_INTEGER:
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{
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/* unsigned integers */
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char *prefix = 0; /* sign, "0x" or "0X" */
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unsigned int prefix_len = 0;
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char buffer[MAXCHARS];
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char *conv_pos = buffer + MAXCHARS;
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unsigned int conv_len = 0;
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unsigned int width = 0;
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unsigned int precision_fill;
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unsigned int field_fill;
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LARGEST_UNSIGNED uvalue = 0;
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int negative = 0;
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if (precision < 0) precision = 1;
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else flags &= ~PAD_ZERO;
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if (flags & SIGNED_YES) {
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/* signed integers */
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LARGEST_SIGNED value = 0;
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switch(flags & SIZE_MASK) {
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case SIZE_CHAR:
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value = (signed char)va_arg(ap, int);
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break;
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case SIZE_SHORT:
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value = (short)va_arg(ap, int);
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break;
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case SIZE_INT:
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value = va_arg(ap, int);
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break;
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#ifndef HAVE_LONGLONG
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case SIZE_LONGLONG: /* Treat long long the same as long */
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#endif
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case SIZE_LONG:
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value = va_arg(ap, long);
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break;
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#ifdef HAVE_LONGLONG
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case SIZE_LONGLONG:
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value = va_arg(ap, long long);
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break;
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#endif
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}
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if (value < 0) {
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uvalue = -value;
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negative = 1;
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} else {
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uvalue = value;
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}
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} else {
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switch(flags & SIZE_MASK) {
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case SIZE_CHAR:
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uvalue = (unsigned char)va_arg(ap,unsigned int);
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break;
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case SIZE_SHORT:
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uvalue = (unsigned short)va_arg(ap,unsigned int);
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break;
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case SIZE_INT:
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uvalue = va_arg(ap,unsigned int);
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break;
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#ifndef HAVE_LONGLONG
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case SIZE_LONGLONG: /* Treat long long the same as long */
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#endif
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case SIZE_LONG:
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uvalue = va_arg(ap,unsigned long);
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break;
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#ifdef HAVE_LONGLONG
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case SIZE_LONGLONG:
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uvalue = va_arg(ap,unsigned long long);
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break;
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#endif
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}
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}
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switch(flags & (RADIX_MASK)) {
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case RADIX_DECIMAL:
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conv_len = output_uint_decimal(&conv_pos,uvalue);
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break;
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case RADIX_OCTAL:
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conv_len = output_uint_octal(&conv_pos,uvalue);
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break;
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case RADIX_HEX:
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conv_len = output_uint_hex(&conv_pos,uvalue, flags);
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break;
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}
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width += conv_len;
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precision_fill = (precision > conv_len) ? precision - conv_len : 0;
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if ((flags & (RADIX_MASK | ALTERNATE_FORM))
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== (RADIX_OCTAL | ALTERNATE_FORM)) {
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if (precision_fill < 1) precision_fill = 1;
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}
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width += precision_fill;
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if ((flags & (RADIX_MASK | ALTERNATE_FORM))
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== (RADIX_HEX | ALTERNATE_FORM) && uvalue != 0) {
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prefix_len = 2;
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if (flags & CAPS_YES) {
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prefix = "0X";
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} else {
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prefix = "0x";
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}
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}
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if (flags & SIGNED_YES) {
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if (negative) {
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prefix = "-";
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prefix_len = 1;
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} else {
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switch(flags & POSITIVE_MASK) {
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case POSITIVE_SPACE:
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prefix = " ";
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prefix_len = 1;
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break;
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case POSITIVE_PLUS:
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prefix = "+";
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prefix_len = 1;
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break;
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}
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}
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}
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width += prefix_len;
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field_fill = (minwidth > width) ? minwidth - width : 0;
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if ((flags & JUSTIFY_MASK) == JUSTIFY_RIGHT) {
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if (flags & PAD_ZERO) {
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precision_fill += field_fill;
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} else {
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CHECKCB(fill_space(ctxt,field_fill));
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}
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}
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if (prefix_len > 0)
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CHECKCB(ctxt->write_str(ctxt->user_data, prefix, prefix_len));
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written += prefix_len;
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CHECKCB(fill_zero(ctxt,precision_fill));
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written += precision_fill;
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CHECKCB(ctxt->write_str(ctxt->user_data, conv_pos,conv_len));
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written += conv_len;
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if ((flags & JUSTIFY_MASK) == JUSTIFY_LEFT) {
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CHECKCB(fill_space(ctxt,field_fill));
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}
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written += field_fill;
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}
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break;
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case CONV_STRING:
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{
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unsigned int field_fill;
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unsigned int len;
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char *str = va_arg(ap,char *);
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if (str) {
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char *pos = str;
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while(*pos != '\0') pos++;
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len = pos - str;
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} else {
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str = "(null)";
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len = 6;
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}
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if (precision >= 0 && precision < len) len = precision;
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field_fill = (minwidth > len) ? minwidth - len : 0;
|
|
if ((flags & JUSTIFY_MASK) == JUSTIFY_RIGHT) {
|
|
CHECKCB(fill_space(ctxt,field_fill));
|
|
}
|
|
CHECKCB(ctxt->write_str(ctxt->user_data, str,len));
|
|
written += len;
|
|
if ((flags & JUSTIFY_MASK) == JUSTIFY_LEFT) {
|
|
CHECKCB(fill_space(ctxt,field_fill));
|
|
}
|
|
written += field_fill;
|
|
}
|
|
break;
|
|
case CONV_POINTER:
|
|
{
|
|
LARGEST_UNSIGNED uvalue =
|
|
(LARGEST_UNSIGNED)(POINTER_INT)va_arg(ap,void *);
|
|
char buffer[MAXCHARS_HEX + 3];
|
|
char *conv_pos = buffer + MAXCHARS_HEX+3;
|
|
unsigned int conv_len;
|
|
unsigned int field_fill;
|
|
|
|
conv_len = output_uint_hex(&conv_pos,uvalue,flags);
|
|
if (conv_len == 0) {
|
|
*--conv_pos = '0';
|
|
conv_len++;
|
|
}
|
|
*--conv_pos = 'x';
|
|
*--conv_pos = '0';
|
|
*--conv_pos = '#';
|
|
conv_len += 3;
|
|
|
|
field_fill = (minwidth > conv_len) ? minwidth - conv_len : 0;
|
|
|
|
if ((flags & JUSTIFY_MASK) == JUSTIFY_RIGHT) {
|
|
CHECKCB(fill_space(ctxt,field_fill));
|
|
}
|
|
|
|
CHECKCB(ctxt->write_str(ctxt->user_data, conv_pos,conv_len));
|
|
written += conv_len;
|
|
|
|
if ((flags & JUSTIFY_MASK) == JUSTIFY_LEFT) {
|
|
CHECKCB(fill_space(ctxt,field_fill));
|
|
}
|
|
written += field_fill;
|
|
}
|
|
break;
|
|
case CONV_CHAR:
|
|
{
|
|
char ch = va_arg(ap,int);
|
|
unsigned int field_fill = (minwidth > 1) ? minwidth - 1 : 0;
|
|
if ((flags & JUSTIFY_MASK) == JUSTIFY_RIGHT) {
|
|
CHECKCB(fill_space(ctxt,field_fill));
|
|
written += field_fill;
|
|
}
|
|
|
|
CHECKCB(ctxt->write_str(ctxt->user_data, &ch, 1));
|
|
written++;
|
|
|
|
if ((flags & JUSTIFY_MASK) == JUSTIFY_LEFT) {
|
|
CHECKCB(fill_space(ctxt,field_fill));
|
|
}
|
|
written+= field_fill;
|
|
}
|
|
break;
|
|
case CONV_WRITTEN:
|
|
{
|
|
int *p = va_arg(ap,int*);
|
|
*p = written;
|
|
}
|
|
break;
|
|
|
|
}
|
|
}
|
|
|
|
return written;
|
|
}
|